//包含n个action type名称常量
export const AUTH_SUCCESS = 'auth_success'//注册/登录成功
export const ERROR_MSG = 'error_msg'//错误提示信息
export const RECEIVE_USER = 'receive_user'//接收用户
export const RESET_USER = 'reset_user'//重置用户信息
export const RECEIVE_USERLIST = 'receive_userlist'//接收用户列表数据
export const RECEIVE_MSG_LIST = 'receive_msg_list'//接收所有相关消息列表
export const RECEIVE_MSG = 'receive_msg'//接收一条消息
export const MSG_READ = 'msg_read'//查看过某个聊天消息
